#4输入一个大于0的整数，判断是否是质数
z=int(input("请输入一个整数"))
if z > 1:
    for i in range(2,z):
        if(number %i ==0):
            print(z,"不是质数")
            print (i,"*",number//i,"=",number)
        break
      else:
        print(z,"是质数")
      else:
        print(z,"不是质数")
